Gyratory crusher shaft lubrication



Julie 2, 1953 o. c. GRUENDR GYRATORY CRUSHER SHAFT LUBRICATION Filed July l, 1949 Patented June 2, 1953 2,640,651 i GYRATORY CRUSHER SHAFT LUBRICATION Oscar C. Gruender, Milwaukee, Wis., as signor'to Nordberg Manufacturing Company, Milwaukee, Wis., a corporation of Wisconsin Application July 19, 1949, Serial No. 105,541

1 Claim.

My invention relates to an improvement in lubricating means for shafts, and has particular relation to the lubrication of gylatory crushers in which an actuating eccentric sleeve surrounds the gyrated shaft of the crusher.

One purpose is to provide a lubricating system effective under heavy duty, as with crushers which are required to crush highly refractory materials.

Other purposes will appear from time to time in the course of the specication and claim.

I illustrate the invention more or less diagrammatically in the accompanying drawings, where- Figure 1 is a vertical axial section; and

Figure 2 is a section on an enlarged scale on the line 2-2 of Figure 1.

Like parts are indicated by like symbols ythroughout the specification and drawings.

Referring to the drawings, I generally indicates any suitable base or support which is provided with a cavity 2 into which part of the crusher may extend. 3 generally indicates a circumferential 5 outer frame element of a gyratory cone Crusher.

1, a circumferential abutment ring 8 and a plug .f

rality of springs 9. The ring 6 is shown as being inwardly screw threaded as at I to receive an outwardly threaded bowl II. suitably mounted on a plate support is a bowl liner I2. I 3 is a xed, and generally cylindrical sleeve which may be secured to or formed integrally with the circumferential frame member 3. For example, the two parts may be secured together by a plurality of generally radially extending ribs or spider arms I4. The sleeve I3 is outwardly enlarged as at I and supports any suitable upwardly concave, generally spherical bearing element or elements I6. I1 is a head having a downwardly convex bearing portion I8 resting upon the support or bearing I6. The head I I is mounted on a crusher shaft generally indicated as 20, the shaft having a downwardly tapered lower portion or extension 2I. 22 is an eccentrically apertured sleeve rotatable within the fixed bearing sleeve I3. 23 is any suitable bearing liner. 24 is a gear secured to the sleeve 22 for unitary movement therewith. It may be rotated by the pinion 25 on the driving shaft 2B which is driven from any suitable power source, not herein shown.

It will be understood that in response to the rotation of the shaft 26, the sleeve 22 is rotated. This inner, eccentric bearing aperture receives the shaft portion 2I, 22a being any suitable bearing liner. The result of the rotation 0f the eccentric sleeve 22 is to impart a gyratory wobble to the head I'I about the center X. The head carries any suitable crushing mantle 28 opposed to the crushing liner I 2, The space between the numbers 28 and I 2 constitutes the crushing space into which the material to be crushed is admitted from above. It may, for example, be directed to and into the top of the crushing cavity by any suitable hopper or deector 29. It will be understood that the details of the crusher do not of themselves form part of the present invention.

In gyratory crushers in which an eccentrically apertured sleeve is used to gyrate a crushing shaft, the lubricating problem is difficult of solution. The present invention is directed tov a lubricating system which provides highly efficient lubrication even though opposed crushing members are subjected to great crushing stress, as in the crushing of unusually hard materials.

30 indicates a lubricant supply pipe extending from any suitable pump, not herein shown. In communication with it is a branch pipe 3| which extends to the fixed bearing sleeve I3, as at 32, at a point generally midway between the top and the bottom of the sleeve I 3. In line with the area of delivery at 32 is an aperture or hole 33 in the bearing liner 23. This in turn is in line with a circumferential duct depression 34 formed about the exterior surface of the eccentrically apertured sleeve 22. Communicating with this circumferential duct or channel 34 is the generally radial I duct or passage 35 extending inwardly through the thin side of the eccentric sleeve 22. It is in interior communication kwith the longitudinally extending channel 34a formed in the inner wall of the eccentric sleeve 22. This in turn extends upwardly to the inner circumferential channel 34h formed in the inner surface of the bearing liner or sleeve 22a. Extending radially inwardly through the shaft 2| is the passage 36 which is in communication with the circumferential channel 34h at its outer end and with the axial oil passage 31 of the shaft portion 2l, at its inner end. Passage 31 serves as an oil delivery duct for lubricating the head bearing. The oil return passage 3B and its branch 33 return oil to the oil return pipe 40 and, ultimately to the main oil return pipe 4 I.

It will be realized that whereas I have described and claimed a practical and operative device, nevertheless, many changes may be made in size,

shape, number and disposition of parts Without departing from the spirit of my invention. I therefore wish my description and drawings to be taken as in a broad sense illustrative and dia grammatic, rather than as limiting me to my specific showing herein.

The use and operation of my invention are as follows:

In a `gyratcry conecrnsher of the type above described, I deliver lubricating oil to the eccentrically apertured sleeve 22 intermediate its upper and lower ends and, therefore,y intermediate the upper and lower ends oi the gyrated shaft which gyrates the head to deliver the crushing compression against the material inthe crushing cavity. The eccentric sleeve 22 has an exterior annular groove 3d which connects with the hole 35 and the vertical groove 34a.. A relatively small-sized hole 36 conveys oil from thecircumferential groove Mb for lubrication of the inner socket-linerie' upon which the head H rests.

Asfwill beiclear from Figure l, the yduet Aiii-is closed at its lower endas at Ella. With the above descrilcaed arrangement,L the oilV enters at the `eenterzoi' the outer and inner bushings or liners andL flows Lboth upwardly and -downwardlyfwith increased Yvolume and pressure.

` Iynd it advantageous to'circulateoil-at a substantially increasedvolume and pressure.l In Vmy structure, I may-double or more than: double the .rateof flovv,:stated ingallons per. minute, in `any I claim:

In combination with a gyratory Crusher having a main frame, a bowl and a head, and means for gyrating it Within the bowl, a fixed sleeve forming part of the main frame, the xed sleeve having a vertical, generally cylindrical bore, a rotatable sleeve mounted within the fixed sleeve, the rotatable sleeve having an eccentric aperture` a crusher shaft positioned Within lthe eccentric aperture, the orusher shaft having a generally axial internal oil passage, closed at the bottom, a head on the Crusher shaft and a bearing support therefor, located above the xed sleeve, an oill'passage extending generally radially from the axial oil passage in the shaft, through the head,

to saidbearing. support at a level well above the OSCAR' C. GRUENDER.

- References Cited Aiii;,tlie1'ile of this-patent UNITED STATES PATENTS Number Name Date 1,402,255 Sanborn Jan. 3, 1922 1,519,625 Munro Dec. 16, 1924 1,592,313 Symons July-13,1926 2,310,601 Rumpel Feb. 9, 1943 FOREIGN PATENTS Number Country Date 380,400 Germany Sept, 15,1923 

